CN114313147A - Installation method of offshore platform upper module - Google Patents
Installation method of offshore platform upper module Download PDFInfo
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- CN114313147A CN114313147A CN202011079919.6A CN202011079919A CN114313147A CN 114313147 A CN114313147 A CN 114313147A CN 202011079919 A CN202011079919 A CN 202011079919A CN 114313147 A CN114313147 A CN 114313147A
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- 238000009434 installation Methods 0.000 title claims abstract description 39
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- 229910000831 Steel Inorganic materials 0.000 claims description 12
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Abstract
The invention discloses an offshore platform upper block installation method, and belongs to the technical field of offshore platform installation. The method comprises the following steps: loading the upper platform block onto a first vessel; connecting first ends of a first support rod and a second support rod, both second ends of which are connected with an upper platform block loaded on a first ship, to a second ship and a third ship on both sides of the first ship respectively; shortening the distance between the second ship and the third ship, and jacking the upper block of the platform to a preset height; moving the second ship and the third ship to align the support legs of the upper part of the platform block with the pile legs of the lower part of the platform; and the distance between the second ship and the third ship is increased, and the butt joint of the support leg and the pile leg is realized. The method adopts the supporting rods to lift and lower the upper part of the block of the platform, has strong flexibility and does not depend on the sea environment. In addition, the method is not only suitable for deep sea operation, but also suitable for construction in shallow water areas, and has strong applicability.
Description
Technical Field
The invention relates to the technical field of offshore platform installation, in particular to an offshore platform upper block installation method.
Background
The offshore platform is a truss structure which is higher than the sea surface and has a horizontal platform surface, and is used for production operation at sea. The offshore platform is divided into an upper block and a lower structure, wherein the upper block is a platform for various production activities, and the lower structure is used for supporting the upper block. With the rapid development of the offshore oil industry, the offshore platform is developing in large-scale and intensive directions. The overall weight of the topsides block also increases, which presents challenges to conventional topsides block installation methods.
At present, the installation method of the platform upper block is generally as follows: and (3) transporting the upper module of the platform to a designated construction sea area by using a ship, and realizing the butt joint installation of the upper module and the lower structure by means of tidal range.
The inventors found that at least the following problems exist in the related art:
when the weight of the upper block of the platform is large, only one ship is used for carrying the upper block of the platform, so that the draught of the ship is increased, and the ship cannot normally sail in the shoal shallow sea area. At this time, deep excavation and dredging of a channel and an installation operation area are required, so that the installation operation cost is increased, and the construction period of the platform is prolonged. In addition, the butt-joint installation of the upper chunk and the substructure of the platform by utilizing the tidal range and pouring seawater into the barge is too dependent on sea environment and barge ballast capacity, and is not flexible and strong in adaptability.
Disclosure of Invention
In view of the above problems, an embodiment of the present invention provides an installation method for an offshore platform upper block, so as to more flexibly implement installation of an offshore platform upper block, and the specific scheme is as follows:
a method of offshore platform topside block installation, the method comprising:
loading the upper platform block onto a first vessel;
connecting a first end of a first support strut to a second vessel, connecting a first end of a second support strut to a third vessel, and connecting a second end of the first support strut and a second end of the second support strut to the platform upper block, respectively, wherein the second vessel and the third vessel are located on either side of the first vessel, respectively;
shortening the distance between the second ship and the third ship to enable the first supporting rod and the second supporting rod to lift the upper module of the platform to a preset height;
moving the second vessel and the third vessel such that the support legs of the platform upper block are aligned with the legs of the platform lower structure;
and increasing the distance between the second ship and the third ship, so that the upper block of the platform descends, and the butt joint of the support legs and the pile legs is realized.
Further, the shortening the distance between the second vessel and the third vessel comprises:
installing a first winch on the second vessel and the third vessel, respectively;
connecting a steel wire rope matched with the first winch to the platform upper block;
by controlling the first winch, the distance between the second vessel and the third vessel is shortened.
Further, the connecting the steel cable used with the first winch to the platform upper block includes:
reinforcing the supporting legs of the platform upper part block by using reinforcing members;
connecting a wire rope used in cooperation with the first winch to the reinforcement.
Further, the first winches on the second and third vessels are provided in plurality and used in pairs.
Further, said moving said second vessel and said third vessel to both sides of said platform substructure comprises: towing the second vessel and the third vessel to both sides of the platform substructure by other vessels.
Further, the second vessel and the third vessel are both self-cruising, the moving the second vessel and the third vessel comprising:
the second vessel and the third vessel are self-propelled to move to both sides of the platform substructure.
Further, after the first supporting rod and the second supporting rod lift the platform upper block to a preset height, the method further comprises: withdrawing the first ship by self-navigation or dragging.
Furthermore, the first end of the first support rod is hinged to the second ship and the first end of the second support rod is hinged to the third ship;
the second end of the first supporting rod is connected with the platform upper portion block in a pin shaft inserting mode, and the second end of the second supporting rod is connected with the platform upper portion block in a pin shaft inserting mode.
Further, the first support rod and the second support rod are both provided in plurality, and the first support rod and the second support rod are used in pairs.
Further, the first supporting rod and the second supporting rod are both in an A shape.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
adopt the bracing piece to carry out jacking and transfer to platform upper portion chunk, and then to the platform upper portion chunk of different sizes or weight, can cooperate the bracing piece that uses different sizes, quantity or structure, the flexibility is stronger, has got rid of the dependence to sea area environment and barge ballast ability. In addition, the double-ship floating mode can effectively share the weight borne by the ship carrying the upper chunk of the platform. Even if the upper part block of the platform with larger weight is installed, the draught of each ship cannot be too deep, so the method is not only suitable for deep sea operation, but also suitable for construction in shallow water, and has stronger applicability. And the crossing of the lower structure of the platform can be relatively easily realized by adopting a double-ship floating mode, so that the adaptability to the lower structure of the platform is stronger.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method of offshore platform topside block installation according to one embodiment of the present invention;
FIG. 2 is a flow chart of another offshore platform topside module installation method in accordance with another embodiment of the present invention;
FIG. 3 is a front view of the first, second and third vessels of the embodiment of the method of FIG. 2, after the connection of the parts is completed, before they leave the port;
FIG. 4 is a side view of the integrated structure of the first support rod in the A-shaped configuration of the embodiment of the method shown in FIG. 2 after the connection of the upper platform block and the second vessel at both ends is completed;
FIG. 5 is a top view of the first and third vessels entering the vessel in the embodiment of the method shown in FIG. 2;
figure 6 is a front view of the support legs of the upper platform block interfacing with the legs of the lower platform structure in the embodiment of the method of figure 2.
Wherein the reference numerals denote:
1-a second vessel;
2-a first vessel;
3-a third vessel;
4-a second support bar;
5-a platform upper block;
51-support legs of the platform upper block;
52-a reinforcement;
6-a first support bar;
7-a first winch;
8-a steel wire rope;
9-platform substructure;
91-legs of the substructure of the platform;
10-a first cable;
11-a second cable;
12-a third cable;
13-sea surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, before implementing the installation method of the offshore platform upper block provided by the present invention, the installation of the lower structure of the platform on the designated sea area needs to be completed, and the installation method used is different depending on the lower structure of the platform, and will not be described one by one here.
Fig. 1 is a flowchart of an offshore platform topside module installation method according to an embodiment of the present invention, and as shown in fig. 1, the offshore platform topside module installation method may include:
step 101, loading the upper platform block on a first ship.
Step 102, connecting the first end of the first support bar to the second vessel, connecting the first end of the second support bar to the third vessel, and connecting the second end of the first support bar and the second end of the second support bar to the upper platform block, respectively.
In consideration of the related art, only one ship is used to carry the relatively heavy upper deck block, resulting in a deep draft of the ship, which is not suitable for the installation work of the upper deck block in a shallow sea area. In the embodiment of the present invention, the second ship and the third ship are provided on both sides of the first ship on which the upper deck block is loaded, and both ends of the first support rod are connected to the second ship and the upper deck block, respectively, and both ends of the second support rod are connected to the third ship and the upper deck block, respectively. And then in the process of carrying the upper part block of the platform, the distance between the second ship and the third ship can be adjusted, so that part of the weight of the upper part block of the platform is transmitted to the second ship and the third ship on two sides through the first supporting rod and the second supporting rod, and the draft of the first ship is reduced.
It should be noted that, the distances between the first ship, the second ship and the third ship need to be reduced to reduce the draft of the first ship, and the collision between the three ships during transportation or ship advance and retreat needs to be avoided to ensure the safety of operation.
After the first support rod and the second support rod are installed and the distances among the first ship, the second ship and the third ship are adjusted, the three ships can stably arrive at the designated construction sea area by keeping the position relation.
In order to conveniently control the first ship and the second ship and consider the stability of the subsequent jacking and lowering operation of the upper block of the platform, the second ship and the third ship with the same or similar specifications can be selected in the embodiment of the invention. Wherein, the specification refers to parameters of the ship such as loading capacity, draft, ship length, ship width, ship height, ballast water system and the like.
And 103, shortening the distance between the second ship and the third ship to enable the upper part block of the platform to be jacked to a preset height.
When the first, second and third vessels arrive at the designated construction sea, the three vessels are at a distance from the established platform substructure, leaving space for the purpose of facilitating the jacking of the platform upper block to a predetermined height. The preset height at least ensures that the lowest point of the supporting legs of the upper chunk of the platform is higher than the highest point of the pile legs of the lower structure of the platform, and a certain safety height is reserved on the basis.
Because first bracing piece and second bracing piece are rigid rod, do not have the compressibility, so reduce when the distance between second boats and ships and the third boats and ships, when drawing close to each other, the angle of intersection between first bracing piece and the second bracing piece diminishes correspondingly to make the platform upper portion piece that first bracing piece and second bracing piece supported can rise.
It should be noted that, the length of the first support rod and the second support rod needs to be set to be capable of jacking the platform upper block to a preset height.
Step 104, moving the second vessel and the third vessel such that the support legs of the offshore platform upper block are aligned with the legs of the platform substructure.
After the upper part of the platform block is jacked to a preset height, the whole weight of the upper part of the platform block is borne by the second ship and the third ship. The second and third vessels are then moved to bring them progressively closer to the substructure and the support legs of the upper platform blocks supported by the two vessels are aligned with the legs of the substructure by adjusting the positions of the two vessels.
And 105, increasing the distance between the second ship and the third ship to enable the upper platform block to descend.
After the supporting legs of the upper portion of the platform module are aligned with the pile legs of the lower portion of the platform, the distance between the second ship and the third ship is increased, so that the intersection angle between the first supporting rod and the second supporting rod is gradually increased, correspondingly, the vertical distance between the second ends of the two supporting rods and the sea surface is gradually reduced, the upper portion of the platform module supported by the supporting rods is gradually reduced, and finally the supporting legs of the upper portion of the platform module are in butt joint with the pile legs of the lower portion of the platform. In the process of lowering the whole platform upper module, the first supporting rod and the second supporting rod always have a supporting effect on the platform upper module.
It should be noted that the upper platform block comprises a plurality of support legs and, correspondingly, the lower platform structure also comprises a plurality of legs matching the support legs.
According to the offshore platform upper part block mounting method provided by the embodiment of the invention, the supporting rods are used for jacking the platform upper part block, so that the flexibility is strong, and the dependence on sea environment and barge ballast capacity is eliminated. In addition, the double-ship floating mode can effectively share the weight borne by the ship for transporting the upper chunk of the platform. Even if the upper part block of the platform with larger weight is installed, the draught of each ship cannot be too deep, so the method is not only suitable for deep sea operation, but also suitable for construction in shallow water, and has stronger applicability. And the crossing of the lower structure of the platform can be relatively easily realized by adopting a double-ship floating mode, so that the adaptability to the lower structure of the platform is stronger.
Fig. 2 is a flowchart of an offshore platform topside module installation method according to another embodiment of the present invention, and the offshore platform topside module installation method shown in fig. 2 will be described with reference to fig. 3, 4, 5 and 6. As shown in fig. 2, the offshore platform upper block installation method may include:
step 201, the topsides block is loaded onto a first vessel.
As shown in fig. 3, the upper platform block 5 is loaded on the first vessel 2 with the second vessel 1 and the third vessel 3 on both sides of the first vessel 2, respectively.
Since the weight of the upper platform block 5 is relatively large, the upper platform block can be loaded on the first ship 2 by a hoisting ship loading mode, a sliding ship loading mode, a rolling ship loading mode, or the like, which is not limited in the embodiment of the present invention.
Step 202, connecting the first end of the first support bar to the second vessel, connecting the first end of the second support bar to the third vessel, and connecting the second end of the first support bar and the second end of the second support bar to the upper platform block, respectively.
In the embodiment of the present invention, the supporting rod is used to lift the upper block 5 of the platform, specifically as shown in fig. 3: the first support bar 6 is connected at a first end to the second vessel 1 and at a second end to the platform upper block 5; a second support bar 4 is connected at a first end to the third vessel 3 and at a second end to the platform upper block 5.
As for the specific connection mode of the support rod with the ship and the platform upper block, taking the first support rod 6 as an example, in the embodiment of the present application, the connection mode of the first end of the first support rod 6 with the second ship 1 may be set as hinged, and the connection mode of the second end thereof with the platform upper block 5 may be inserted.
For example, taking the first support rod 6 as an example, a "U" shaped groove may be formed at the second end of the first support rod 6, and a pin shaft is installed on the platform upper block 5, and the second end of the first support rod 6 is connected to the platform upper block 5 through the matching of the pin shaft and the "U" shaped groove.
The second support bar 4 is connected to the third vessel 3 in the same manner as described above for the first support bar 6 and will not be described in detail here.
It should be noted that the second ends of the first and second support bars 6 and 4 should be connected to the platform upper block 5 at a position where the strength is high. And the strength of the joint can be further reinforced, for example, the thickness of the steel structure of the joint is increased in advance.
Further, in order to improve the strength of the support bar, the embodiment of the present invention structurally designs the first support bar 6 and the second support bar 4, taking the first support bar 6 as an example: two rigid rods are arranged to form an acute angle between the two rods, one end of each rigid rod is fixedly connected, and a connecting rod is arranged between the two rods to enable the whole combination body to be in an A-shaped structure, so that a first supporting rod 6 is formed. Similarly, the second support rod 4 may be configured in the above-mentioned a-shaped configuration. Be above-mentioned A style of calligraphy structure with first bracing piece 6 and second bracing piece 4, can improve the stability of bracing piece to the security of platform upper portion chunk jacking and transfer process has been guaranteed.
As shown in fig. 4, when the first supporting rod 6 is in the above-mentioned a-shaped structure, the tip portion of the a-shape is the second end of the first supporting rod 6, which is connected to the upper platform block 5; the other end opposite the tip portion is the first end of the first support bar 6, which is connected to the second vessel.
The supporting rods are adopted to lift and lower the upper part of the block of the platform, and the flexibility is strong. The size, number or structure of the supporting rods can be adjusted according to the weight of the platform upper block. For example, when the weight of the platform upper block is heavier, the number of the first support bar and the second support bar may be increased accordingly, or a support bar with a larger diameter or a stronger strength such as the above-mentioned a-shaped structure may be used, or a combination of the above-mentioned methods may be used. And if any problem occurs in the installation process, the operation can be stopped at any time, and the operation is more convenient.
It should be noted that, when the first support bar 6 and the second support bar 4 are provided in plural, they are preferably used in pairs, so that the platform upper block 5 can be stably lifted and lowered.
And step 203, installing a first winch on the second ship and the third ship respectively, and connecting a steel wire rope matched with the first winch to the upper assembly block of the platform.
In the embodiment of the present invention, the second vessel 1 and the third vessel 3 are barges (without self-propulsion capability), so that the movement of the two vessels needs to be realized by external force. In this regard, as shown in fig. 3, in the present embodiment, a first winch 7 is installed on each of the second vessel 1 and the third vessel 3, and a wire rope 8 engaged with the first winch 7 is connected to the platform upper block 5. Therefore, the length of the steel wire rope 8 can be adjusted by controlling the first winch 7, and the jacking and the lowering of the upper part block 5 of the platform are realized.
The steel wire 8 may be connected to the support legs 51 of the upper platform block 5, which is convenient for operation, or the steel wire 8 may be connected to other parts of the upper platform block 5.
Furthermore, it is considered that the support legs 51 of the platform upper block 5 may be deformed after being pulled by the steel wire 8, thereby affecting the safety of the operation. In this regard, the embodiment of the present invention reinforces the support legs 51 of the upper deck block with the reinforcing members 52 to ensure that the support legs 51 have sufficient strength to withstand pulling of the wire rope.
For example, a fixing rod may be provided between two adjacent support legs 51 and connected to the two support legs 51 by welding or the like.
The material, the sectional shape, the size and the number of the fixing rods can be reasonably set according to specific conditions, and the fixing rods are not limited here.
It is also possible to fix all the support legs 51 of the upper platform block 5 integrally by means of large clips, in such a way that the mounting and dismounting is easier.
After the first winches 7 are arranged on the second ship 1 and the third ship 3, before the first ship 2, the second ship 1 and the third ship 3 leave the port, the length of the steel wire rope 8 can be adjusted by controlling the first winches 7 on the two sides, and further the distance between the second ship 1 and the third ship 3 is adjusted, so that part of the weight of the platform upper module 5 is transmitted to the second ship 1 and the third ship 3 on the two sides through the supporting rods. That is, the weight of the upper deck block 5 is carried by the above three ships in common. So that the draft of the first vessel 2 can be reduced during the subsequent carrying process and at the same time the draft of the second vessel 1 and the third vessel 3 is not increased.
Thus, in embodiments of the invention, both the second vessel and the third vessel may be selected to be shallow draft vessels. That is, the method can be suitable for installing the upper-part chunk of the platform on the shallow sea area, so that deep excavation and dredging of a channel and an installation operation area are not needed, the installation operation cost is saved, and the platform construction period is shortened.
And 204, controlling the first winch to shorten the distance between the second ship and the third ship and lift the upper chunk of the platform to a preset height.
When jacking operation is carried out, all the first winches 7 are controlled to synchronously run through one set of control system, the first winches 7 are utilized to synchronously exert pulling force, the second ship 1 and the third ship 3 are made to approach each other, and then the intersection angle between the first supporting rod 6 and the second supporting rod 4 is made to be small, so that the platform upper portion module 5 supported by the first supporting rod can rise.
Wherein the number of first winches 7 may be set accordingly depending on the weight of the upper platform block 5, for example, when the weight of the upper platform block 5 is heavy, the number of first winches 7 or the power of the first winches 7 may be increased accordingly to increase the power for bringing the second vessel 1 and the third vessel 3 closer to each other. In addition to the above-described way of increasing the number of first winches 7, the power may be increased by increasing the number of sets of pulleys per first winch 7. It should be noted here that the first winches on the second vessel 1 and the third vessel 3 are provided in pairs so that the platform upper block 5 can be evenly stressed to smoothly lift and lower the platform upper block 5.
After the platform upper block 5 is jacked to a preset height, all the weight of the platform upper block is borne by the second ship 1 and the third ship 3 on two sides, at the moment, the first ship 2 completes all the operation tasks of the platform upper block, and the first ship 2 can be withdrawn in a self-navigation or dragging mode.
And 205, dragging the second ship and the third ship to two sides of the lower platform structure in a mooring anchoring mode, so that the supporting legs of the upper platform block are aligned with the pile legs of the lower platform structure.
Since the second and third vessels cannot move by self-propulsion, in the embodiment of the invention, the two vessels are towed to both sides of the platform substructure 9 by mooring and anchoring, and the support legs 51 of the platform upper block 5 are aligned with the legs 91 of the platform substructure 9 by adjusting the positions of the two vessels. The mooring anchoring method is shown in fig. 4, and specifically comprises the following steps:
a first rope 10 is provided, which first rope 10 comprises 4 ropes. The first cables 10 are each connected at a first end thereof to a predetermined position outside the bow and the stern of the second and third vessels 1 and 3, respectively, and at a second end thereof anchored at a designated position.
A second rope 11 is provided, which second rope comprises 2 ropes. The second lines 11 are each connected at a first end to the second vessel 1 and the third vessel 3, respectively, and at a second end to different legs 91 at the distal end of the platform substructure 9.
A third rope 12 is provided, which third rope comprises 2 ropes. And the two second lines 12 are arranged in an interdigitated arrangement with their first ends connected to the second vessel 1 and the third vessel 3, respectively, and their second ends connected to different legs 91 at the proximal end of the platform substructure 9, respectively.
It should be noted that the above-mentioned cable connection method is only described by way of example, and other reasonable cable laying methods may be adopted.
Wherein, the mooring rope is matched with the second winch for use. The second winch is provided with a plurality of second winches which respectively control different cables. The second winches are controlled to run synchronously to shorten or lengthen the cables which work in conjunction with each other, so that the second vessel 1 and the third vessel 3 are pulled into both sides of the platform substructure 9. The lengths of the cables are adjusted by controlling the second winches to adjust the positions of the two ships, and finally the support legs 51 of the upper platform block 5 are aligned with the pile legs 91 of the lower platform structure 9.
It should be noted that the first winch and the second winch in the embodiment of the present invention function differently, and are not identical. Compared with the second winch, the first winch is larger and has better performance.
And step 206, controlling the first winch to increase the distance between the second ship and the third ship so as to enable the platform upper chunk to descend.
As shown in fig. 6, after the support legs 51 of the upper platform block 5 and the pile legs 91 of the lower platform structure 9 are aligned, the winch control system is used to control the first winches 7 on both sides to synchronously operate, and the length of the steel wire rope 8 is adjusted to make the second ship 1 and the third ship 3 away from each other, so that the intersection angle between the first support rod 6 and the second support rod 4 gradually increases, and correspondingly, the vertical distance between the second ends of the two support rods and the sea surface 13 gradually decreases, so that the supported upper platform block 5 gradually descends, and finally the support legs 51 of the upper platform block 5 and the pile legs 91 of the lower platform structure 9 are butted.
Further, in order to ensure the accurate butt joint of the upper platform block 5 and the lower platform structure 9, as shown in the enlarged portion of fig. 6, in the embodiment of the present application, the top ends of the legs 91 of the lower platform structure 9 are tapered, and correspondingly, the bottom ends of the support legs 51 of the upper platform block 5 are tapered grooves to be fitted with the tapered structure. Thus, in the process of up-and-down butt joint, the tapered groove can quickly position the supporting leg 51 of the platform upper block 5, so that quick and accurate butt joint can be realized.
Alternatively, the bottom ends of the support legs 51 of the upper platform block 5 may be tapered and correspondingly the top ends of the legs 91 of the lower platform structure 9 may be tapered to fit the tapered structure.
Further, in order to improve the strength of the butt joint of the support leg 51 and the pile leg 91, the butt joint may be fastened and connected by welding, pouring cement, or bolting, so as to ensure the stability of the installed platform upper block.
After the installation of the platform upper block 5 is completed, the wire rope 8, the first support bar 6 and the second support bar 4 connected thereto may be removed, and the anchor lines for mooring may be recovered. And the second barge 1 and the third barge 3 are towed from the construction sea area by using tugboats.
In addition, in the embodiment of the invention, the second ship 1 and the third ship 3 can have self-propulsion capability, the distance between the two ships can be adjusted and the ships can move to the two sides of the platform lower part structure 9 only by self-propulsion, and the ships do not need to move by means of external force. Thus, for the above steps, it is not necessary to provide the first winches 7 on the two vessels, and it is also not necessary to tow the two vessels behind to both sides of the platform substructure 9 by means of mooring anchoring.
Specifically, after the first ship 2, the second ship 1 and the third ship 3 reach the designated construction sea area, the second ship 1 and the third ship 3 on the two sides of the first ship 2 move by themselves and approach each other, so that the first support rod 6 and the second support rod 4 lift the platform upper block 5 to a preset height.
It should be noted that, during the jacking process, the distance between the bow of the second ship 1 and the stern of the third ship 3 is always consistent with the distance between the stern of the two ships, that is, during the driving process, the two ships are always kept in parallel to ensure the stability of the block 5 on the upper part of the platform.
Then, the second vessel 1 and the third vessel 3 are driven to both sides of the platform substructure 9 by self-propulsion, and the positions of the two vessels are adjusted so that the support legs 51 of the platform upper block 5 supported by the two vessels are aligned with the spud legs 91 of the platform substructure 9.
After the alignment, the second ship 1 and the third ship 3 gradually get away from each other by self-navigation, so that the intersection angle between the first support rod 6 and the second support rod 4 gradually becomes larger, and correspondingly, the vertical distance from the second ends of the two support rods to the sea surface 13 also gradually becomes smaller, so that the supported platform upper block 5 gradually descends, and finally the support legs 51 of the platform upper block 5 are butted with the pile legs 91 of the platform lower structure 9.
It should be noted that, all the above optional technical solutions may be combined arbitrarily to form an optional embodiment of the disclosure, and are not described in detail herein.
According to the offshore platform upper block mounting method provided by the embodiment of the invention, the supporting rods are used for jacking the platform upper block, so that the supporting rods with different sizes, numbers or structures can be matched for the platform upper blocks with different sizes or weights, the flexibility is strong, and the dependence on sea environment and barge ballast capacity is eliminated. In addition, the double-ship floating mode can effectively share the weight borne by the ship for transporting the upper chunk of the platform. Even if the upper part block of the platform with larger weight is installed, the draught of each ship cannot be too deep, so the method is not only suitable for deep sea operation, but also suitable for construction in shallow water, and has stronger applicability. And the crossing of the lower structure of the platform can be relatively easily realized by adopting a double-ship floating mode, so that the adaptability to the lower structure of the platform is stronger.
It should be understood that the sequence of the steps in the above embodiments of the present invention can be properly adjusted, and the steps can be increased or decreased according to the situation, and the method for installing the offshore platform upper block provided by the present invention is not limited to the method steps described above and shown in the drawings, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method of offshore platform topside block installation, the method comprising:
loading the upper platform block onto a first vessel;
connecting a first end of a first support strut to a second vessel, connecting a first end of a second support strut to a third vessel, and connecting a second end of the first support strut and a second end of the second support strut to the platform upper block, respectively, wherein the second vessel and the third vessel are located on either side of the first vessel, respectively;
shortening the distance between the second ship and the third ship to enable the first supporting rod and the second supporting rod to lift the upper module of the platform to a preset height;
moving the second vessel and the third vessel such that the support legs of the platform upper block are aligned with the legs of the platform lower structure;
and increasing the distance between the second ship and the third ship, so that the upper block of the platform descends, and the butt joint of the support legs and the pile legs is realized.
2. The offshore platform topside block installation method of claim 1, wherein said reducing a distance between said second vessel and said third vessel comprises:
installing a first winch on the second vessel and the third vessel, respectively;
connecting a steel wire rope used with the first winch to the platform upper block,
by controlling the first winch, the distance between the second vessel and the third vessel is shortened.
3. The offshore platform topside module installation method of claim 2, wherein said attaching a wireline used in conjunction with said first winch to said platform topside module comprises:
reinforcing the supporting legs of the platform upper part block by using reinforcing members;
connecting a wire rope used in cooperation with the first winch to the reinforcement.
4. The offshore platform topside block installation method of claim 3, wherein said first winches on said second and third vessels are provided in plurality and used in pairs.
5. The offshore platform topside block installation method of claim 4, wherein said moving said second vessel and said third vessel comprises: towing the second vessel and the third vessel to both sides of the platform substructure by means of mooring anchors.
6. The offshore platform topside block installation method of claim 1, wherein said second vessel and said third vessel are both self-cruising,
the moving the second vessel and the third vessel comprises:
the second vessel and the third vessel are self-propelled to move to both sides of the platform substructure.
7. The offshore platform upper block installation method according to any one of claims 1 to 6, wherein after the causing the first and second support bars to jack up the platform upper block to a preset height, the method further comprises: withdrawing the first ship by self-navigation or dragging.
8. The offshore platform topside module installation method of any one of claims 1-6,
the first end of the first support rod is hinged to the second ship and the first end of the second support rod is hinged to the third ship;
the second end of the first supporting rod is connected with the platform upper module block in an inserting mode, and the second end of the second supporting rod is connected with the platform upper module block in an inserting mode.
9. The offshore platform topside block installation method of claim 8, wherein said first support bar and said second support bar are each provided in plurality and said first support bar and said second support bar are used in pairs.
10. The offshore platform topside module installation method of claim 9, wherein said first support pole and said second support pole are both a-shaped.
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| CN202011079919.6A CN114313147A (en) | 2020-10-10 | 2020-10-10 | Installation method of offshore platform upper module |
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| CN202011079919.6A CN114313147A (en) | 2020-10-10 | 2020-10-10 | Installation method of offshore platform upper module |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4714382A (en) * | 1985-05-14 | 1987-12-22 | Khachaturian Jon E | Method and apparatus for the offshore installation of multi-ton prefabricated deck packages on partially submerged offshore jacket foundations |
| US5607260A (en) * | 1995-03-15 | 1997-03-04 | Khachaturian; Jon E. | Method and apparatus for the offshore installation of multi-ton prefabricated deck packages on partially submerged offshore jacket foundations |
| US20100316449A1 (en) * | 2009-06-11 | 2010-12-16 | Technip France | Modular topsides system and method having dual installation capabilities for offshore structures |
| CN104527940A (en) * | 2014-12-09 | 2015-04-22 | 中国海洋石油总公司 | Ocean platform block offshore double-boat integral migration method |
| CN105035260A (en) * | 2015-05-19 | 2015-11-11 | 中国海洋石油总公司 | Method for integrally detaching topside module of offshore abandoned platform |
| EP3508412A1 (en) * | 2018-01-04 | 2019-07-10 | Robert Bosch GmbH | Topside lifting device, topside lifting arrangement, vessel comprising the topside lifting arrangement, and method of lifting or lowering a topside |
| CN111268059A (en) * | 2020-02-28 | 2020-06-12 | 中远海运特种运输股份有限公司 | Offshore platform dismantling method |
| CN211417550U (en) * | 2019-11-06 | 2020-09-04 | 海洋石油工程股份有限公司 | Marine double-ship floating-support installation device for large-scale blocks |
-
2020
- 2020-10-10 CN CN202011079919.6A patent/CN114313147A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4714382A (en) * | 1985-05-14 | 1987-12-22 | Khachaturian Jon E | Method and apparatus for the offshore installation of multi-ton prefabricated deck packages on partially submerged offshore jacket foundations |
| US5607260A (en) * | 1995-03-15 | 1997-03-04 | Khachaturian; Jon E. | Method and apparatus for the offshore installation of multi-ton prefabricated deck packages on partially submerged offshore jacket foundations |
| US20100316449A1 (en) * | 2009-06-11 | 2010-12-16 | Technip France | Modular topsides system and method having dual installation capabilities for offshore structures |
| CN104527940A (en) * | 2014-12-09 | 2015-04-22 | 中国海洋石油总公司 | Ocean platform block offshore double-boat integral migration method |
| CN105035260A (en) * | 2015-05-19 | 2015-11-11 | 中国海洋石油总公司 | Method for integrally detaching topside module of offshore abandoned platform |
| EP3508412A1 (en) * | 2018-01-04 | 2019-07-10 | Robert Bosch GmbH | Topside lifting device, topside lifting arrangement, vessel comprising the topside lifting arrangement, and method of lifting or lowering a topside |
| CN211417550U (en) * | 2019-11-06 | 2020-09-04 | 海洋石油工程股份有限公司 | Marine double-ship floating-support installation device for large-scale blocks |
| CN111268059A (en) * | 2020-02-28 | 2020-06-12 | 中远海运特种运输股份有限公司 | Offshore platform dismantling method |
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